Analysis of examination results of external quality assessment network of iodine deficiency disorders laboratories in Hebei Province in 2017 / 中华地方病学杂志

ABSTRACT

Objective To evaluate the results of external quality assessment (EQA) of iodine deficiency disorders laboratories and the network operation in Hebei Province in 2017 in order to further improve the quality of EQA and provide reliable laboratory quality assurance for epidemiological surveillance and control of iodine deficiency disorders. Methods The EQA of salt iodine, water iodine and urinary iodine of iodine deficiency disorders laboratories at provincial, prefectural and county levels in Hebei Province in 2017 was evaluated. Among them, there were 1 provincial, 11 prefectural, and 128 county-level laboratories participated in the national urinary iodine assessment; there were 1 provincial and 11 prefectural-level laboratories participated in the national water iodine assessment; 1 provincial, 11 prefectural, and 30 county-level laboratories participated in the national salt iodine assessment;and 138 county-level laboratories participated in the provincial-level salt iodine assessment. The testing results of water iodine and urinary iodine of all the participatory laboratories were evaluated by using standard Z score generated from laboratories participated in the examination. The testing results of salt iodine were evaluated by using reference value ± uncertainty. Results One provincial and 11 prefectural-level iodine deficiency disorders laboratories in Hebei Province participated in the national urinary iodine, water iodine and salt iodine assessment, the qualified rate was 100.0％(12/12);128 county-level iodine deficiency disorders laboratories participated in the national urinary iodine assessment, the qualified rate was 100.0％(128/128);30 county-level iodine deficiency disorders laboratories took part in the national salt iodine assessment, the qualified rate was 100.0％(30/30);and 138 county-level iodine deficiency disorders laboratories participated in the provincial-level salt iodine assessment, the qualified rate was 94.9％(131/138). Conclusions Iodine deficiency disorders laboratories in Hebei Province in 2017 have remained at a relatively high level in detection quality, and network operation is good. Only a few county-level laboratories failed to pass the examination. Therefore, the key task in the future is to strengthen the detection capacity of county-level laboratories.